merge revision(s) 46b544c54955348ef1ea9692b837b061f59f91cd, d3abee739f4feb91bb9aaae33877d70c8c576db0: [Backport #21095]

	Prefer `uname -n` over `hostname`. (#12647)

	Add fallback for `hostname` if `uname` isn't available. (#12655)

1 files changed, 9 insertions, 1 deletions

diff --git a/spec/ruby/library/socket/socket/gethostname_spec.rb b/spec/ruby/library/socket/socket/gethostname_spec.rb
index 4b79747b27..89e1ed496f 100644
--- a/spec/ruby/library/socket/socket/gethostname_spec.rb
+++ b/spec/ruby/library/socket/socket/gethostname_spec.rb
@@ -2,7 +2,15 @@ require_relative '../spec_helper'
 require_relative '../fixtures/classes'
 
 describe "Socket.gethostname" do
+  def system_hostname
+    # Most platforms implement this POSIX standard:
+    `uname -n`.strip
+  rescue
+    # Only really required for Windows without MSYS/MinGW/Cygwin etc:
+    `hostname`.strip
+  end
+
   it "returns the host name" do
-    Socket.gethostname.should == `hostname`.strip
+    Socket.gethostname.should == system_hostname
   end
 end